Disk wheel



March 30 1926.

G. H. FORSYTH DISK WHEEL Filed March 24. 1922 Patented Mar. 30, 1926.

UNITED STATES PATENT OFFICE.

GEORGE E. FORSYTH, OF CHICAGO, ILLINOIS, ASSIGNOR TO MOTOR WHEEL CORPORA- TION, F LANSING, MICHIGAN, A CORPORATION OF MICHIGAN.

DISK WHEEL.

Application filed March 24, 1822.

To all whom it may concern:

Be it known that I. Gannon H. FonsYrH, a citizen of the United States, residing at Chicago, in the county of (look and State of Illinois, have invented certain new and useful Improvements in Disk Wheels, of which the following is a specification.

This invention has for its primary object the adaptation of a disk wheel for the provision of strength, resiliency. pleasing contour and convenience of assembly of the huh. ilisk, body and rim. together with ease of access to the usual straight valve stem of the tire for inflating without impairing these features of the wheel.

It is recognized that a dished disk. preferably reversely curved in radial section, has greater resistance as a wheel body to hoth diametric and lateral strains and also greater capacity for recovery from deformation than has a flat disk whether disposed parallel to the wheel plane or at an inclination.

The employment of a disk of such curvatare to the huh and rim in such relation as to conserve the important qualities of resilience. strength, resistance to diametric and lateral stresses and recovery from deforn'lation introduces difiiculty by way of interference between the disk and the usual valve stem. and many expedients have been re sorted to for overcoming or minimizing the same. such as, for instance. providing deep pockets in the wheel face and housing therein a horizontally projecting angular valve stem. aperturing the disk and projecting the valve stem therethrough, disposing the valve stem at an inclination to the wheel plane. etc.

My invention provides access from the front of the wheel to a straight valve stem disposed in the wheel plane without materially altering the disk contour and without weakening the same by slotting or perforating thedisk inwardly of the rim while utilizing a. dished disk of reversely curved ra dial section.

The invention also presents the advantage of lateral withdrawal of the rim. tire and valve stem from the wheel without necessity of lifting the same axially to free the stem from the disk.

Other advantages of. the invention, whether embodied in a wheel equipped with Serial No. 546,272.

demountable rim, or with fixed rim and demountable at the hub will he apparent to those skilled in the art.

In order that the invention may be readily understood and appreciated Ihave illustrated the same in the accompanying drawings as embodied in two disl' wheels of diiferent contour and in the accompanying description based upon such illustrations have set forth the detailed features of such embodiments. It is to he understod, however, that thesetwo examples are given by way of exemplification only and the invention is not to he constl ted as limited thereby.

I n the drawings- F1gs. 1 and 2 are radial sections throu h (lLSk wheels of slightly different contour illustrating the embodiment of the invention therein.

Having particular reference to Fig. 1 of a the drawing the pressed steel hub 11 having an ntegral rear radially projecting flange 12 is assembled by means of the removable front flange or plate 13 and the bolts 14 with the single dished disk 15. It will be observed that the curvature of the central portion of the disk lying adjacent the flan e 12 is slightly different from that' of the an e at the point 16 with the result that as the hub flanges and disk are assembled contact is first obtained at 17 near the periphery of the flange 12 whereby the tightening of the bolts 14 and to insure a firm hearing support at the point 17 for the disk.

Outwardly beyond the hub connection the disk curves to the rear and again to the front presenting a forwardly concave surface in its medial or hody portion, with a forwardly projecting shoulder or head 18 whence the disk extends in its peripheral portion radially and then rearwardly at 19 to an inclined marginal portion 20 which constitutes a rear support for the rim 21, in this case shown as demountahle. The forward edge of the rim 521 is supported by a rim-retaining member 22 here shown as a ring. although as an equivalent. construction individual separatedclips or other rim-retaining means may be employed. The ring 22 has its inner portion fulcrumed at 23 upon the shoulder 18 of the disk 15.

At a point corresponding to the location serves to centrally stress the disk I the valve stem 24 the rimretaining ring is notched at 25 and the valve stem 2 xtends through said notch and is closed by he cup 26 which bears at its upper edge upon the lower horizontal portion of the ring about the notch.

In Fig. 2 of the drawing the cast. or forged hub 32' is of similar construction being proiidcd with the integral flange 28 and the tumut'iild, flange or plate 29 between which the central portion of the disk 38 is clamped hv the bolts Ill. As in the former case, the iillillll portion ot the disk and of the flanges is preferably such as to secure intimate firm contact at the mint 32. Here the disk extends rcaruardl and again forwardly to present the oncave intermediate or body portion provided with a head or shoulder 33 and tllvnro extends in its peripheral portion radially and resrwerdly to the inclined supportin r margin 3,4. As in the former rose the run 21 supported at its front edge liv the rim-retaining element 35, here shown in a. ring fulrrumed at its inner edge 36 upon the beaded portion 33 of the disk.

In this form of construction it will he oh- .r'rvcd that that portion of the disk adjacent thr valve stem 24 extends forwardly across the median plane of impact of the wheel and thus forivurdlv beyond the valve stem, the mis of whichnormally coincides with such median plane. This is true throughout the did; illt'l'lll at the point where the valve tlil i located. Here the disk is radially i(* '(-l=-=il as illustrated at 37 and the valve rlllli lit-s within such recess,'its lower end (iIYCIfii by the cup 38 extending inwardly in u n'msideriihlo distance.

A. shown in both Figs. l and 2, it will be ohserved that. as distinguished from a rediallv corrugated disk. the front contour of the disk hody is plain, having a front surface generated by the revolution about. the wheel axis of it line nngularlv projected therefrom, whether such line he straight or curved in the plane of the wheel axis.

In Fig. 't it will he seen that each portiaiin of the disk 1.? is at the rear of the median plane of wheel impact. while in Fig. 2 the ventral and peripheral portions of the disk mtvud across the median plane of impact to the front thereof. In the former case the retaining ring is reressed to out-low the valve stem. whereas in th (2 latter case the disk is itself recessed to accommodate the valve stem. In neither case is the disk weakened by perforating or slotting the same to acvounumlate the valve stem. am yet the valve stem is brought to the front of the tlh'li and is made readily acressilile for inflating pur- Pill-0S.

It. will also be observed that whether the lllt carrying the valve stem is to be rcniovcd from a fixed rim as in case of needed repair or whether a deznountuble rim carr vii'ig the tire is to be removed from the wheel. in either case after the removal of the rimrctaining ring or clips the tire can be with drawn from the wheel laterally without the necessity of lifting; the valve stem radially out of an aperture of the disk or from hrhind an imperforate disk.

Thus the employment of a straight valve stem in connection with a perforated disk of the revcrsely curved type l made ronipatihlo with accessibility of the valve stem for inlotion from the front and as ociatm with the feature of ready \vithdruwul laterally.

I claim:

1. In a disk wheel, the combination of a. hub, a rim adapted to carry a pneumatic tire with a substentiall straight valve stem, and a dished disk connecting the hub and rim, the disk uniformly dished in its body portion as viewed concentrically of the hub and shaped in its outer portion to form a. seat for one side of the run and to accommodate the valve stem wholly in front thereof.

2. In a disk wheel, the combination of a huh portion. a rim portion adapted to carry a. pneumatic tire equipped with a. straight valve stem, and a disk portion, the bodz of the disk having a front contour generated by the revolution about the wheel axis of a. line singularly projected therefrom, said disk being shaped in its pripheral portion to form a seat for one side of the rim and to accommodate the valve stern wholly in front thereof.

3. In a disk wheel, the combination of a hub portion, a. rim portion adapted to carry a pneumatic tire equipped with a straight valve stem and a dished disk portion, the body of the disk having a front contour generated by the revolution about the wheel axis of a line curved in the nlune of the axis and angularly projected therefrom. said disk being shaped in its peripheral portion to accommodate the valve stem Wholly in front thereof.

4. In a disk wheel, the combination of a huh portion, a rim portion adapted to carry pneumatic tire equipped with a valve stem, and a disk portion, the body of the disk having a front contour generated by the revolution :ibout the Wheel axis of a line onuulurlv projected therefrom and nonparalh-l to the median plane of the wheel, said disk living shaped in its pripheral porlion to form a seat for the rim and to anr-ouunodato the valve stem Wholly in front;

In a disk wheel. the combination of a hub ortion. a disk body portioina dcinouutu du rini adapted to curry a pneumatic tire e uipped with a substantially redial valve stem. end a rim-retaining: clement. hearing upon the front of the rim and of the disk, the valve stem lying \vholl in front of the disk and the outer portion of the rim-retaining element lying in front of the valve stem but leaving the inflation end of the same exposed inwardly from said element.

6. In a disk wheel, the combination of a hub portion, a disk body portion a demountable rim adapted to (any a pneumatic tire equipped with a substantiallyradial valve stem, and a rim-retaining element bearing upon the front of the rim and of the disk, the valve stem lying largely between the disk and the rim-retaining element but with its inflation end disposed in front of the disk radially inward from the rim-retaining element.

7. In a disk wheel. the combination of a hub portion, a disk body portion, a de1nountable rim adapted to carry a pneumatic tire equipped with a substantially radial valve stem, and a rim-retaining element bearing upon the front of the rim and of the disk, the valve stem lying Wholly in front of the disk and the outer portion of the rim retaining element lying in front of the valve stem but having the continuity of its inner portion interrupted to permit the valve stem to extend from behind the said element to a point radially inward therefrom.

In testimony whereof I have hereunto snb scribed my name.

GEORGE H. FORSYTH.

ing element lying in front of the valve stem but leaving the inflation end of the same e'xposed inwardly from said element.

6. In a disk wheel, the combination of a hub portion, a disk hody portion. a demountable rim adapted to carry a pneumatic tire equipped with a substantially'radial valve stem, and a rim-retaining" element bearing upon the front of the rim and of the disk, the valve stem lying largely between the disk and the rim-retaining element but with its inflation end disposed in front of the disk radially inward from the rim-retaining element.

7. In a disk wheel, the combination of a hub portion, a disk body portion, a demountable rim adapted to carry a pneumatic tire equipped with a substantially radial valve stem, and a rim-retaining element bearing upon the front of the rim and of the disk, the valve stem lying Wholly in front of the disk and the outer portion of the rim-retaining element lying in front of the valve stem but having the continuity of its inner portion interrupted to permit the valve stem to extend from behind the said element to a point radially inward therefrom.

In testimony whereof I have hereunto sub scribed my name.

GEORGE I-I. FORSYTH.

, Certificate of Correction. It is hereby certified that in Letters Patent No. 1,578,975, franted Mareh 30,

1926, upon the application of George II. Forsyth, of Chicago,

llinois, for an improvement in Disk Wheels, anerror appears in the printed specification requiring correction as follows: Page 2, line 108, claim 3, after the word portion insert the words to form a seat for one side of the rim and; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the ease, in the Patent Ofiice.

Signed and sealed this 4th day of May, A. 1926.

[semi] M. J. MOORE, Acting Oomvmlssioner of Patents.

' Certificate of Correction.

It is hereby certified that in Lot-{PR Patent No. 1,578,975, ranted March 30, 1926, upon the appiiuatinn of George H, Forsyth 0F ('hicago, llinois. for an improvemeni, in Disk Wheels, an error appears in the printed specification requiring correction as follows: Page. 2, line 108 claim 3, after the word portion insert the words to fawn a seat for 071/: x1770 of flu: rim and, and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

sighed and sealed this 4th day of May A. D. 1926.

[emu] M. J. MOORE,

Acting Commissioner of Patents. 

